they are a bitch! took me almost an hour to get them on, well the trottle sleeve, I ended up turning the trottle sleeve on the sander to thin it out, ground out the metal tabs on the grips ( we powdered them so i was very careful)
i ended up pulling off the metal rings, boiling water, putting the grip in there, then lubing the sleeve wiht dish soap, pulled it out and gently clamped it in the vice, then twist and push twist and push till it was on! plus the grips are shorter than reg grips so after it was on, i had to take it back off to shave the sleeve down a bit... just sucked at 3am